22440813181 has 2 divisors, whose sum is σ = 22440813182. Its totient is φ = 22440813180.

The previous prime is 22440813149. The next prime is 22440813193. The reversal of 22440813181 is 18131804422.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19397525625 + 3043287556 = 139275^2 + 55166^2 .

It is a cyclic number.

It is not a de Polignac number, because 22440813181 - 2⁵ = 22440813149 is a prime.

It is a super-2 number, since 2×22440813181² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22440853181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11220406590 + 11220406591.

It is an arithmetic number, because the mean of its divisors is an integer number (11220406591).

Almost surely, 2^22440813181 is an apocalyptic number.

It is an amenable number.

22440813181 is a deficient number, since it is larger than the sum of its proper divisors (1).

22440813181 is an equidigital number, since it uses as much as digits as its factorization.

22440813181 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12288, while the sum is 34.

The spelling of 22440813181 in words is "twenty-two billion, four hundred forty million, eight hundred thirteen thousand, one hundred eighty-one".